Method of preparing polyaniline films and highly self-oriented films obtained
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United States of America Patent
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Mar 24, 2015
Grant Date -
Nov 17, 2011
app pub date -
Mar 13, 2009
filing date -
Mar 13, 2008
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Abstract
The present invention concerns a method for preparing polyanilines by oxidative polymerization of aniline in an aqueous acid medium, comprising at least one synthesis step carried out in the presence of a) a monomer with formula (An) RmRo—C6H3—NHR′ in which Ro, Rm and R′ independently of each other, represent H or a linear or branched alkyl, alkoxy, alkylcarboxy or alkylsulfonic group, containing 1 to 6 carbon atoms, b) an acid, c) an oxidizing agent and d) a salt, characterized in that the acid is formic acid. The PANI deposited and dried on a support provides films with 80% of crystalline phase, having a strong alignment of π-π interactions parallel to the surface. The PANI and the films obtained may be used as semiconductors and/or conductors.
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